Squid - Revision history

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-'''Squid''' are cephalopods of the two orders [[Myopsida]] and [[Oegopsida]], which were formerly regarded as two suborders of the order [[Teuthida]], however recent research shows Myopsida and Oegopsida are distinct orders. Squids are among the most intelligent of invertebrates, with some large species exhibiting complex behaviors and high learning capabilities.
+{{Short description|Marine cephalopod mollusc}}
-== Anatomy ==
+'''Squid''' are [[cephalopod]] [[molluscs]] of the order [[Teuthida]], which comprises around 300 species. Like all cephalopods, squid have a distinct head, bilateral symmetry, a mantle, and arms. Squid are primarily soft-bodied, with a small internal skeleton in the form of a rod-like gladius or pen.
-== Behavior ==
+==Anatomy and Physiology==
-Squids are strong swimmers and certain species can 'fly' for short distances out of the water. They are carnivorous, and the majority of squids are active predators, eating fish, other sea creatures, and even other squids. Squids use their tentacles to catch prey and their beak to kill and tear prey into manageable pieces.
+[[File:Vampyroteuthis_infernalis.jpg|thumb|right|Vampire Squid]]
-== Reproduction ==
+The squid's body is elongated and tubular, with a head that is distinct from the mantle. The mantle cavity houses the main organs, including the [[gills]], [[heart]], and [[digestive system]]. Squid have a closed circulatory system, which is more efficient than the open circulatory systems found in other molluscs.
-== Human Interaction ==
+==Locomotion==
-Squids are a popular food in many parts of the world, and squid fisheries make up a significant portion of the global fishery. They are used in cuisines around the world, often known as "calamari". Squids have also been the focus of many myths and legends, including the giant squid and the kraken.
+Squid are known for their ability to move rapidly through the water. They achieve this by jet propulsion, expelling water from the mantle cavity through a siphon. This method of locomotion allows them to reach speeds of up to 25 miles per hour.
-== See Also ==
+==Reproduction==
 * [[Cephalopod]]
 * [[Octopus]]
 * [[Cuttlefish]]
-* [[Kraken]]
+* [[Mollusca]]
 [[Category:Cephalopods]]
-[[Category:Marine fauna]]
+[[Category:Marine biology]]
-[[Category:Commercial fish]]
+[[Category:Molluscs]]

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 File:Taningia_danae.gif|Squid
 File:Ancistrocheirus_lesueurii.jpg|Squid
 </gallery>

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 {{stub}}
 == Squid ==
 <gallery>
 File:Sepioteuthis_sepioidea_(Caribbean_Reef_Squid).jpg|Squid

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← Older revision		Revision as of 12:08, 18 February 2025
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	[[Category:Commercial fish]]		[[Category:Commercial fish]]
	{{stub}}		{{stub}}
			== Squid ==
			<gallery>
			File:Sepioteuthis_sepioidea_(Caribbean_Reef_Squid).jpg\|Squid
			File:Nautilus_belauensis_profile_(white_background).jpg\|Squid
			File:Octopus_vulgaris_Merculiano.jpg\|Squid
			File:Vampyroteuthis_infernalis.jpg\|Squid
			File:Cranchiidae_sp_(cropped).jpg\|Squid
			File:Psychroteuthis_glacialis_paralarva.jpg\|Squid
			File:Onychoteuthis_banksii2.jpg\|Squid
			File:Sandalops_melancholicus.jpg\|Squid
			File:Architeuthis_princeps_image_modified.PNG\|Squid
			File:Lepidoteuthis_grimaldii_617_mm_ML.jpg\|Squid
			File:Taningia_danae.gif\|Squid
			File:Ancistrocheirus_lesueurii.jpg\|Squid
			</gallery>

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New page

'''Squid''' are cephalopods of the two orders [[Myopsida]] and [[Oegopsida]], which were formerly regarded as two suborders of the order [[Teuthida]], however recent research shows Myopsida and Oegopsida are distinct orders. Squids are among the most intelligent of invertebrates, with some large species exhibiting complex behaviors and high learning capabilities.

== Anatomy ==
Squids have a soft body. Their body can rapidly change colors and patterns. Squids have eight arms and two tentacles furnished with denticulated suckers, with which they secure their prey. They have a distinct head, bilateral symmetry, a mantle cavity, and arms. Squids have a complex brain in the form of a nerve ring encircling the oesophagus, and a highly developed nervous system, including complex eyes similar to those of vertebrates.

== Behavior ==
Squids are strong swimmers and certain species can 'fly' for short distances out of the water. They are carnivorous, and the majority of squids are active predators, eating fish, other sea creatures, and even other squids. Squids use their tentacles to catch prey and their beak to kill and tear prey into manageable pieces.

== Reproduction ==
Squids are semelparous, meaning they reproduce just once before dying. Most squids lay eggs, although some species give live birth. The male squid deposits a spermatophore, or packet of sperm, into the female's mantle cavity with a specially adapted arm, the hectocotylus.

== Human Interaction ==
Squids are a popular food in many parts of the world, and squid fisheries make up a significant portion of the global fishery. They are used in cuisines around the world, often known as "calamari". Squids have also been the focus of many myths and legends, including the giant squid and the kraken.

== See Also ==
* [[Cephalopod]]
* [[Octopus]]
* [[Cuttlefish]]
* [[Kraken]]

== References ==
<references />

[[Category:Cephalopods]]
[[Category:Marine fauna]]
[[Category:Commercial fish]]
{{stub}}